Locking means for shells



v. R. DESPAHD.y

LOCKING MEANS FOR SHELLS.

APPL|C AT|0N FILED Ame. 1918.

1,369, 16.7. Patented Feb. 22, 1921,

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UNITEa stares PATEN-r lorjiicfa.f-

vieron. n. DEsPAnD, or HINSDALE, ILLINois, AssisNon, BY iicizisllrz.Assieivmnivrs To. Meern. MANUFACTURING company, or vALPAnnIso,INDIANA.. v.A commu:

TION 0F IN DIAN A..

LOCKING Mms Fon ennuis,

Specificationof Ilietters Patent'. 'I Al'I )aiK-bill1-11Mi-Fbi. 22,`19221..

Application med April e", isis. serial ivo. 22mm',

To all whom, it may concern:

Be it known that l, VICTOR R.' DnsPAnD,

a citizen of the United States, residing at Hinsdale, in `thel county ofDupage and Statev of Illinois, have invented.l a certain new and usefulImprovement in Locklng Means for Shells, of which the `followin,c .isI afull, clear, concise, and exact description, f reference being had-tothe accompanyingV drawings, forming a part of this'specification. g

Myv invention relates to locking means for shells, that is forlockingshells and caps tov gather so as to hold the incandescent socket1n positlon, an object being to provide an improved and simplifieddevice of this character in which the cap and shell are securely heldtogether under normal conditions but maybe readily separated bymanipulation when desired. One of the features of my invention is animproved form of skirt on the cap and a coperating collapsible end onthe shell whereby all the parts are securelyheld together. In thisconnection I have provided a conical circul'arly'recessed skirt4 on thecap and a correspondingly formedshouldered portion at the end-of ltheshell so'` that the shell may be inserted telescopically into the recessof the skirt where it is'acted'v upon by a lu on the interior of theskirt so as to lock t e parts together.

Referring now more particularly to several preferred embodiments of myinvention as illustrated in the accompanying drawing in which likereference characters indicate like parts: y

Figure 1 is -a sidev elevation of 'oneform of my invention showing themultiple position cap and shell assembled;

Fig. 2 shows the collapsible end of the shell; f Fig. 3 is a sectionalong the line 3-3 of Fig. 2; i -Fig. 4.- is a section along the line4--4 of Figi 1;

- Fig. 5 is a transverse section line 5-1-5 of Fig. 4;

Fig. 6 is a viewlooking upwardly into theinterior of tli'ecap removedfrom the shell; Fig. 7 is ya detaill view of the adjustable lugcarrying-arm which is fitted inside the iig. e is 'a capii View @i ai@pappie which is staked in the cap; l

abuts inside. the inturned' vedge 22 of the,

along the i lig.;r`v 9 is a iianged collar which passes through the lugarm andl is secured to the interior ofthe cap by the nipple ;`Y

Fig. 10 1s aside elevation of another form my invention in which-theshell 'and cap 'have but' a single adjustment;

Fig. 11 1s a section along the line 11e-11 of Fig. 10; A

Fig. '12 is a of Fig. 11; f

Fig. 13 is an interior view` of Athe single position cap; l

Eig. l14 1s a perspective `view of the single position cap; and i 1g. 151s a locking washer for the Single" position cap.

Referring now to the first form of my inf vention as shown in Figs; l1to 9, it 'com-i prises a shell 15 having the usual key slot y16 wl11 chis preferably' enlarged at 17 so that the "side edges thereof may engagethe'` outer edges ofl the locking lug hereinafter Section along the line12-.12

.more fully referred to. The corners 18 'of the'slot'are pressedinwardly slightlyso as to properly lpa' the socket key. The lower endofthe shell 15 is provided with 'a roll 80 thread adapted to receive ashade'holder or similar. device. The upper yend .of the `shell 1sprovlded witha conlcal shouldered ange 19 adapted-to be telcscopicallyinserted into a corresponduigly formed` skirt 20 -of the cap 21, `thisskirtihaving its edge 22 drawn inwardly so aste form a shoulder andprovide a circular. recess in the skirt. Thus when the shell is insertediin the` ca it first collapses .and as kthe shoulder 'on t e ange 9019.4 of the shell passes the "edge 22 on the skirt, the shell. againexpands and snaps into holding position in the cap.y When thusassembledythe shoulder 23 on the a'nge v19 A s skirt while the #edgev 24of thek @ange 19 abuts'theshoulder "25..Q-.the skirt 20, the

shell thus losingy firmly held Qagainst any rocking motion.The-construction" asthus far described would permit of'a readyseparationgof the cap andv shell by` a'longitudinal pnli onfthe parte..That is', unless something is provided to prevent anormal collapse ofthe shelliit may be readily vnpitlidrawii fromv the cap.. .f;4 Bnt',.ainr'iii-cleito prevent 'such a 105 separation ofthe-parts vl provide alocking lug 26 `which "ieg, carried vwithin the cap. I and acts upon theedges 1710i the key slot,

this lug in the form of my invention shown in Figs. 1 to 9 being anadjustable lug 26 vcarried by a lug carrying arm or yoke 27,

rotatably mounted Within the cap and securely fastened thereto. For thispurpose the nipple 28 carries a shank 29 adapted to be inserted throughthe central opening oi the'cap and extending through the central openingof a flanged hub 30 which hub passes lthrough the central opening of thebearing 31 in thev lug carrying arm. The central openingof the cap 21has a notched edge 32 asis also shown in Fig. 14, these notches and thenotches 33 in the hub 30 corresponding so that the shank 29 on thenipple may be staked and pressed into the serrations as shown in Fig. 6.Thus the nipple and hub 30 are locked in the cap against rotation butthe lug carrying arm.

-27 is free to be rotated within thev cap, the lug 26 being preferably apair of projecting elements adapted to snap into the perforation 34 inthe skirt 2O so that. the locking lug may be circumferentially adjustedinto any one of a plurality of positions. By means of this adjustmentthe shell and cap may be positioned in any one of many relativeadjustments. In order to rotate the lug carrying arm into the 'desiredposition a screw driver or similar tool is mserted at the point 35 (Fig.6) between the lug and cap and the lug pushed away from the cap so as tobe clear of the perforations 34 at which time the lug may be rotatedinto the desired position and permitted to snap back into the properperforations. An insulated lining 36 is provided in the cap being pretner'ably the usual `fiber lining which in the present case'is snappedinto the position back of the lugs 37, 38 which are pressed out-by theWall of the lug carrying arm. Thus the ber lining is maintained inposition and rotates with the lug carrying arm but maintains the capsuitably insulated from the socket. i

In assemblin the cap and shell of the form shown in ligs. 1 to 9 theedge 24 of skirt. It is not necessary that the locking lug and shellslot line up when the' parts are placed togetherl because theysnaptogether whether they are lined up or not and it' not lined up the shellis simply rotated in the cap until the edges 17 ot' the slot registerwith 'the lug 26, at which time the shell fully ex ands into lockingposition. it is thus hel against rotary adjustment and leeinner face ofthe lug 26. The 'shell is thus partly collapsed and may be separatedfrom the cap by a direct longitudinal pull.

Figs. 10 to Referring now to the form of my invention as shown in Figs.10 to` 15 it diifers from the form already described in that the cap andshell have' but one position of assembly. That is, in the present form Ido not provide an adjustable locking lug but simply depress portions ofthe metal at 40 and 41 of the cap 44 (Fig. i4), these'depressions actingthe same as the lug 26' in that they coperate with the edges of the slotin the shell to prevent its'collapse. In this form of my invention thehub 29 on the nipple 28 is inserted through the central opening in thecap and throu h awasher 42 (Fig. 15), being then stake so that thenipple is locked against rotation in the cap. Inorder to hold theinsulating lining 36 in the sirligle position cap 44, a pair of ears 45,46 ig. v11) are pressed inwardly' from the cap so as to hold the liningin place.

In this form ofmy invention, that is as shown i-n (Figs. 10 to 15) thesame shell 15 may be used as in the first form described, the conicalband on this shell' and the recessed skirt 20 on the cap 44 bein the samshape in both forms. In assem lin an .separating the parts the operation1s the same asdescribed in connection with the irst form of myinvention. .I

For the purpose of illustrating my invention I have shown severalpreferred lforma but Iunderstand that changes and modifications willreadily occur to those skilled in the art and therefore l do not desireto. be limited to the exact forms of my invention as shown and describedbut aim to cover all that which comeswithin the spirit and scope of theagpended'claims.

What

claim as new and desire to secure -by Letters Patent is:

1. A device ot the character vdescribed comprising a ca havingaiconicall recessed skirt, and a she l having acollapsi le shoulderedinturned end adapted to be telescopically inserted into the recess ofthe skirt.

2.. A device ot the `clniracter described comprising-a cap' having arecessed skirt,- and a shell having a collapsible conical shoulderedinturned 4end adapted to be tele'- scopically inserted into the recessof' the skirt.

3. A device of the character described comprising a cap having a conicalcircularly recessed skirt, and a shell having a telescopic shkiulderedinturned end provided with means to engage Within the recess of the cap.

4. A deviceof the character described comprising a cap having aconicalcircular-ly recessed skirt, and a collapsible shell having a telescopicshouldered inturned end conforming -to the recess of the skirt andadapted to lock therein.

5. A device of the character described comprising a cap having a conicalcircularly recessed skirt, and a collapsible shell having a telescopicend conforming to the recess of the skirt and adapted to lock thereinand means to prevent relative longitudinal and rotary movement of thevcap and shell.

6. A y device of the character' described comprisinga cap having aconical skirt with turned-in edge, and a telescopic shell `having ashouldered conical band conforming to the conical skirt and adapted tolock therein.

7. A device of the character described comprising a cap having aconically recessed skirt, and a shell having an inwardly movableshouldered inturned end for telescopic insertion into the recess of theskirt, and means to prevent relative rotary movement of the cap andshell.

In Witness whereof, I hereunto subscribe my name this 3rd da of April,A. D. 1918.

VIC OR R. DESPARD.

